package com.atguigu.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.lang.annotation.Annotation;
@Slf4j
@Component
public class RtGlobalFilter implements GlobalFilter , Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        final ServerHttpRequest request = exchange.getRequest();
        final ServerHttpResponse response = exchange.getResponse();
        final String uri = request.getURI().toString();
        long start = System.currentTimeMillis();
        log.info("请求【{}】开始：时间：{}",uri,start);
        //=======================以上是前置逻辑=============
        final Mono<Void> filter = chain.filter(exchange).doFinally((result)->{
            //=======================以下是后置逻辑=============
            long end = System.currentTimeMillis();
            log.info("请求【{}】结束：时间：{},耗时，{}ms",uri,end,end-start);
        });//放行

        return filter;
    }


    @Override
    public int getOrder() {
        return 0;
    }
}
